Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "loss distribution" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 21
Tytuł:
Investigation of half-normal model using informative priors under Bayesian structure
Autorzy:
Khawar Kiani, Sania
Aslam, Muhammad
Bhatti, M. Ishaq
Powiązania:
https://bibliotekanauki.pl/articles/18105212.pdf
Data publikacji:
2023-09-08
Wydawca:
Główny Urząd Statystyczny
Tematy:
informative prior
squared root inverted gamma distribution (SRIG)
Bayesian hypothesis testing
loss functions
Opis:
This paper considers properties of half-normal distribution using informative priors under the Bayesian criterion. It employs the squared root inverted gamma, Chi-square and Rayleigh distributions as the prior distribution to construct the Posterior distributions of the respective distributional parameters. Hyperparameters are elicited via prior predictive distribution. The properties of posterior distribution are studied, and their graphs are presented using a real data set. A comprehensive simulation scheme is conducted using informative priors. Bayes estimates are obtained using the loss functions (squared error loss function, modified loss function, quadratic loss function and Degroot loss function). Statistical inferences interval estimates and Bayesian hypothesis testing are presented to demonstrate the usefulness of the study.
Źródło:
Statistics in Transition new series; 2023, 24, 4; 19-36
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic based evaluation of DGs in capacitor allocated optimal distribution network
Autorzy:
Srinivasan, G.
Amaresh, K.
Cheepati, Kumar Reddy
Powiązania:
https://bibliotekanauki.pl/articles/2173535.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ISSOT-WF
capacitor placement
capacitor sizing
feeder reconfiguration
dispersed generation
electrical distribution network
additional power loss reduction
rozmieszczenie kondensatorów
wymiarowanie kondensatorów
rekonfiguracja podajnika
generacja rozproszona
sieć dystrybucji energii
redukcja strat mocy
Opis:
Feeder reconfiguration (FR), capacitor placement and sizing (CPS) are the two renowned methods widely applied by the researchers for loss minimization with node voltage enrichment in the electrical distribution network (EDN), which has an immense impact on economic savings. In recent years, optimization of FR and CPS together can proficiently yield better power loss minimization and save costs compared to the individual optimization of FR and CPS. This work proposes an application of an improved salp swarm optimization technique based on weight factor (ISSOT-WF) to solve the cost-based objective function using CPS with and without FR for five different cases and three load levels, subject to satisfying operating constraints. In addition, to ascertain the impact of real power injection on additional power loss reduction, this work considers the integration of dispersed generation units at three optimal locations in capacitive compensated optimal EDN. The effectiveness of ISSOT-WF has been demonstrated on the standard PG&E-69 bus system and the outcomes of the 69-bus test case have been validated by comparing with other competing algorithms. Using FR and CPS at three optimal nodes and due to power loss reduction, cost-saving reached up to a maximum of 71%, and a maximum APLR of 26% was achieved after the installation of DGs at three optimal locations with the significant improvement in the bus voltage profile.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; e139053, 1--10
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interval shrinkage estimation of the parameter of exponential distribution in the presence of outliers under loss functions
Autorzy:
Nasiri, Parviz
Powiązania:
https://bibliotekanauki.pl/articles/2108120.pdf
Data publikacji:
2022-09-14
Wydawca:
Główny Urząd Statystyczny
Tematy:
interval information
mean square error
shrinkage estimator
exponential distribution
uniform distribution
outliers
Linex loss function
Opis:
In this paper, we studied estimators based on an interval shrinkage with equal weights point shrinkage estimators for all individual target points θ¯ ∈ (θ0, θ1) for exponentially distributed observations in the presence of outliers drawn from a uniform distribution. Estimators obtained from both shrinkage and interval shrinkage were compared, showing that the estimators obtained via the interval shrinkage method perform better. Symmetric and asymmetric loss functions were also used to calculate the estimators. Finally, a numerical study and illustrative examples were provided to describe the results.
Źródło:
Statistics in Transition new series; 2022, 23, 3; 65-78
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study on exponentiated Gompertz distribution under Bayesian discipline using informative priors
Autorzy:
Aslam, Muhammad
Afzaal, Mehreen
Bhatti, M. Ishaq
Powiązania:
https://bibliotekanauki.pl/articles/1917073.pdf
Data publikacji:
2021-12-08
Wydawca:
Główny Urząd Statystyczny
Tematy:
exponentiated Gompertz distribution
loss functions
informative priors
Bayes estimators
posterior risks
Opis:
The exponentiated Gompertz (EGZ) distribution has been recently used in almost all areas of human endeavours, starting from modelling lifetime data to cancer treatment. Various applications and properties of the EGZ distribution are provided by Anis and De (2020). This paper explores the important properties of the EGZ distribution under Bayesian discipline using two informative priors: the Gamma Prior (GP) and the Inverse Levy Prior (ILP). This is done in the framework of five selected loss functions. The findings show that the two best loss functions are the Weighted Balance Loss Function (WBLF) and the Quadratic Loss Function (QLF). The usefulness of the model is illustrated by the use of reallife data in relation to simulated data. The empirical results of the comparison are presented through a graphical illustration of the posterior distributions.
Źródło:
Statistics in Transition new series; 2021, 22, 4; 101-119
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research and Solution Proposals to Optimize Distribution Power Grids in Smart Grid Condition
Autorzy:
Pham, Trung Son
Nguyen, Dinh Tien
Nguyen, Quang Thuan
Dang, Quang Khoa
Powiązania:
https://bibliotekanauki.pl/articles/2020237.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
smart grid
power loss
energy loss
optimization
distribution power grids
strata energii
optymizacja
dystrybucja
Opis:
Smart Grid is a concept for transforming the electric power grid by using advanced automatic control and communications techniques and other forms of information technology. It integrates innovative tools and technologies from: generation, transmission and distribution. This also includes consumer appliances and equipment. This concept integrates energy infrastructure, processes, devices, information and markets into a coordinated and collaborative process. All allowing energy to be generated, distributed and consumed flexibly and efficiently. However, the Smart Grid with the integration of distributed generation itself also creates a several disadvantages. There can be problems with: stability and reliability, relay protection, isolation and operational isolation in which the problem is to create a burden on the distribution grid when transmitting electrical energy sources. Optimizing power flow and bringing high operating efficiency on Smart Grid conditions is an urgent issue. This paper focuses on researching and proposing solutions for optimal calculation of power flow on Smart Grid. The paper has researched, and analyzed calculation solutions to optimize power flow and proposed to use the Lagrange multiplier method. The study performed calculations for a typical Smart Grid model with three distributed generations. Calculation results have shown that the role of the method is to fully perform the optimal calculation of the power flow on the grid. This is in order to reduce power loss and energy loss as well as increasing operational efficiency while improving power quality in Smart Grid conditions.
Źródło:
Inżynieria Mineralna; 2021, 2; 479--486
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Probability Distribution Function for Modelling Path Loss for Wireless Channels Applications over Micro-Cellular Environments of Ondo State, Southwestern Nigeria
Autorzy:
Abiodun, Chukwutem Isaac
Ojo, Joseph Sunday
Powiązania:
https://bibliotekanauki.pl/articles/1075736.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Path loss
normal distribution
probability distribution function
wet and dry season
Opis:
In this research, the most appropriate probability distribution function for modelling RF signal path loss values in both wet and dry season months over urban, suburban and rural environments of Ondo State are presented. The data used consist of a drive test measurement campaign carried out in a typical urban, suburban and rural areas of Ondo State, South-western Nigeria in both wet and dry season months. The received signal strength (RSS) values were collected and recorded in log files alongside other environmental parameters using TEMS investigation tools. Path loss values were deduced from the measured RSS values. Some selected probability distribution function namely: gamma, lognormal, extreme value, logistic, Weibull and normal distributions function were fitted to the measured path loss values and the best suited one determined using three different metric measures. Results obtained show that normal distribution presents the best probability distribution curve for modelling the RF signal path loss over different micro-cellular environments of Ondo State. A typical result of the rural environment indicates that in wet season months, the normal distribution has RMSE of 7.060 dB, Relative Error of 12.480 % and R2 of 0.988, in dry season months, the RMSE is 9.060 dB, Relative Error of 13.450 % and R2 of 0.985. When compared with other distribution models, the same trend could be seen in other environments, although with different values of RMSE, Relative error and R2. The mean and the standard deviation parameters for the normal distribution estimated, vary seasonal-wise and are environment dependent. However, the rural environment exhibited a wider seasonal variations when compared with the other environments. The results of this research is useful as a first-hand information in the planning of future wireless propagation channels in the studied environments.
Źródło:
World Scientific News; 2019, 118; 74-88
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-server queueing system with external and internal customers
Autorzy:
Tikhonenko, O.
Ziółkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/199838.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
single-server queueing system with non-homogeneous customers
random volume customers
loss probability
total volume distribution
Laplace transform
Laplace-Stieltjes transform
RAM memory space
prawdopodobieństwo straty
transformacja Laplace'a
transformata Laplace'a-Stieltjesa
pamięć RAM
Opis:
In the paper, we investigate a single-server queueing system with unlimited memory space and non-homogeneous customers (calls) of the two following types: 1) external customers that are served by the system under consideration, 2) internal customers that arrive and interrupt the service process only when an external customer is being served. The external customers appear according to a stationary Poisson process. Customers of each of the above-mentioned types are characterized by some random volume. The customer service time depends arbitrarily on its volume. Two schemes of customer service organization are analyzed. The non-stationary and stationary distributions of the total volume of customers present in the system are determined in terms of Laplace and Laplace-Stieltjes transforms. The stationary first and second moments of total customers volume are also calculated. The obtained results are used to approximate loss characteristics in analogous systems with limited buffer space. Numerical examples illustrating theoretical results are attached as well.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 4; 539-551
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Loss modeling with mixtures distributions in R package
Autorzy:
Sitek, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/434037.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
finite mixture of distributions
loss distribution
maximum likelihood estimate
EM algorithm
Opis:
Finite mixtures of probability distributions may be successfully used in the modeling of probability distributions of losses. These distributions are typically heavy tailed and positively skewed. Finding the distribution that fits loss data well is often difficult. The paper shows that the use of mixed models can significantly improve the goodness-of-fit of the loss data. The paper also presents an algorithm to find estimates of parameters of mixture distribution and gives an illustrative example. The analytical approach is probably the most often used in practice and certainly the most frequently adopted in the actuarial literature. It is reduced to finding a suitable analytical expression which fits the observed data well. For parameters estimation we use the maximum likelihood method applying the Newton-Raphson and EM algorithm. Computations of goodness-of-fit can be judged using the Akaike information criterion.
Źródło:
Śląski Przegląd Statystyczny; 2017, 15 (21); 183-200
1644-6739
Pojawia się w:
Śląski Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method of distribution network reconfiguration at daily operation scheduling
Metoda rekonfiguracji sieci w codziennym działaniu
Autorzy:
Golub, I.
Voitov, O. N.
Semenova, L. V.
Boloev, E. V.
Powiązania:
https://bibliotekanauki.pl/articles/952867.pdf
Data publikacji:
2017
Wydawca:
ENERGA
Tematy:
distribution network
loss reduction
renewable power generation
reconfiguration
active energy consumer
graph theory
sieć dystrybucyjna
redukcja strat
generacja mocy ze źródeł odnawialnych
rekonfiguracja
aktywny odbiorca energii
teoria grafów
Opis:
The paper suggests a two-stage optimization algorithm of daily load curves of a distribution network to decrease electricity purchase costs and determine a primary distribution network configuration in presence of renewable power generation or without it. The first stage includes optimization of the daily load curves of active consumers, which ensures decrease of electricity purchase costs considering its price and daily consumption invariability. At the second stage the problem distribution network reconfiguration is solved to decrease power losses in it. The numerical calculations for the test distribution networks confirm the efficiency of the suggested algorithms.
W poniższym artykule zaproponowano dwustopniowy algorytm optymalizacji dobowego wykresu obciążenia sieci dystrybucyjnej w celu obniżenia kosztów zakupu energii elektrycznej oraz określenia konfiguracji sieci pierwotnej z uwzględnieniem lub bez uwzględnienia źródeł odnawialnych. Pierwszy etap polega na optymalizacji dobowego wykresu obciążeń dla aktywnych odbiorców energii, co zapewni spadek kosztów zakupu energii ze względu na niezmienność cen i poziom zużycia energii. W drugim etapie zajęto się problemem rekonfiguracji sieci dystrybucyjnej w celu zmniejszenia strat mocy z sieci. Przeprowadzone obliczenia numeryczne dla testowej sieci dystrybucyjnej potwierdzają efektywność proponowanych algorytmów.
Źródło:
Acta Energetica; 2017, 2; 57-62
2300-3022
Pojawia się w:
Acta Energetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ anomalii i defektów cieplnych na rozkład temperatury ścian zewnętrznych
Autorzy:
Krause, P.
Powiązania:
https://bibliotekanauki.pl/articles/161065.pdf
Data publikacji:
2017
Wydawca:
Polski Związek Inżynierów i Techników Budownictwa
Tematy:
ściana zewnętrzna
rozkład temperatury
strata ciepła
defekt
anomalia
diagnostyka cieplna
symulacja numeryczna
pole temperatury
external wall
temperature distribution
heat loss
defect
anomaly
thermal diagnostics
numerical simulation
temperature field
Opis:
W artykule przedstawiono zagadnienia wpływu anomalii i defektów cieplnych na rozkład temperatury ścian zewnętrznych. Błędy wykonawcze powstałe na etapie wznoszenia obiektów budowlanych mogą wpływać na zaburzenie pola temperatury na wewnętrznej i zewnętrznej powierzchni ścian. Zmiany te w większości przypadków są negatywne ze względu na ochronę cieplną budynku. W takich sytuacjach istotne jest dokładne zdiagnozowanie występujących nieprawidłowości, a także poprawne zinterpretowanie powstałych zaburzeń cieplnych. W rozwiązaniu powyższych problemów można wykorzystać dostępne narzędzia obliczeniowe, bazujące m.in. na metodzie elementów skończonych.
Źródło:
Przegląd Budowlany; 2017, 88, 10; 15-18
0033-2038
Pojawia się w:
Przegląd Budowlany
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance evaluation of an M/G/n-type queue with bounded capacity and packet dropping
Autorzy:
Tikhonenko, O.
Kempa, W. M.
Powiązania:
https://bibliotekanauki.pl/articles/331288.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
AQM algorithm
finite buffer
loss probability
total packet volume
queue size distribution
aktywne zarządzanie kolejką
prawdopodobieństwo straty
rozkład wielkości kolejki
Opis:
A queueing system of the M/G/n-type, n ≥ 1, with a bounded total volume is considered. It is assumed that the volumes of the arriving packets are generally distributed random variables. Moreover, the AQM-type mechanism is used to control the actual buffer state: each of the arriving packets is dropped with a probability depending on its volume and the occupied volume of the system at the pre-arrival epoch. The explicit formulae for the stationary queue-size distribution and the loss probability are found. Numerical examples illustrating theoretical formulae are given as well.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 841-854
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power Loss Reduction With Optimal Size And Location Of Capacitor Banks Installed At 132 kv Grid Station Qasimabad Hyderabad
Autorzy:
Katyara, S.
Shah, M. A.
Iżykowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/410606.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
capacitor bank
power loss
voltage profile
distribution system
MATLAB
Opis:
With Growing Concerns About Voltage Profile And Power Factor At Distribution Networks, The Capacitor Banks Are Invariably Installed For Reactive Power Compensation. The Reactive Power Supplied By Capacitor Banks Is Proportional To Square Of Their Rated Loading Voltage. Capacitor Banks Eventually Increase The Loading Capacity Of Feeders, So As To Supply More Customers Through Same Line Section. Capacitor Banks Can Be Installed Anywhere On The Network. The Idea Of This Paper Is To Reduce Total Power Loss And Ensure Greater Availability Of Capacitor Bank Installed At 132 Kv Grid Station Qasimabad Hyderabad, For Reactive Power Compensation, Even Under Worst Conditions On Distribution System. This Is Achieved By Enhancing Its Location And Size. At Present Capacitor Bank Of Full Size, I.E. Of 1.21 Mvar Is Installed At 11 Kv Bus Of 132 Kv Grid Station Qasimabad Hyderabad. Moreover This Paper Suggests Small Sized Capacitor Banks That Would Be Installed At Different Feeders Instead Of One Large Size Capacitor Bank At 11 Kv Bus. The Voltage Profile And Power Losses With Present Sized Capacitor Bank And The Proposed Small Sized Capacitor Banks Are Compared In This Work. The Distribution Network Has Been Simulated By Using MATLAB .
Źródło:
Present Problems of Power System Control; 2016, 7; 53-64
2084-2201
Pojawia się w:
Present Problems of Power System Control
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and analysis of low bend losses of the air core optical fiber for wavelength selective devices
Autorzy:
Palodiya, V
Raghuwanshi, S K
Powiązania:
https://bibliotekanauki.pl/articles/173243.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
air core optical fiber
bending loss
mode field distribution
optical mode converter
Opis:
In this paper, the bending loss, modal field diameter and the modal field distribution of the air core optical fiber are investigated. The effect of optical and geometrical parameters on the bending loss, power confinement and modal field diameter are examined in this special fiber. Detailed design parameters and operation principles of the air core optical fiber are discussed. The structure is based on a unique three layered structure of air core optical fiber, having the central air core, germanium silicate ring core, and silica cladding. It has been demonstrated that air core optical fiber has an excellent mode transformation capability. The air core optical fiber is expected to have a versatile application in local area optical communication networks and tunable wavelength selective devices. The main advantages of air core optical fiber are low bend loss and small mode field diameter, which is a prime focus of this paper.
Źródło:
Optica Applicata; 2015, 45, 3; 341-353
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ROBUSTNESS OF TWEEDIE MODEL OF RESERVES WITH RESPECT TO DISTRIBUTION OF SEVERITY OF CLAIMS
Autorzy:
Boratyńska, Agata
Juszczak, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/453337.pdf
Data publikacji:
2015
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
loss reserves
Tweedie model
Poisson and gamma distribution
ε-contamination
generalized linear model
mean square error
bias
prediction
Opis:
The aim of the work is to discuss the robustness of estimation procedures and robustness of prediction in Tweedie's compound Poisson model. This model is applied to the claim reserving problem. The quality of parameter estimators and predictors is studied when the distribution of severity of claims is disturbed. The ε-contamination class of distributions is considered. The example, where errors of estimators are large is presented. The simulation methods, using the R programming environment, are applied.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2015, 16, 1; 53-74
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimizacija setejj vodosnabzhenija goroda
Optimization of water supply city
Autorzy:
Tkachuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/76810.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
pumping station
water distribution system
water supply system
water loss
urban system
energy efficiency
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 6
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies